c# - How to show checkbox as checked in SAP B1 UserForm? -

namespace bordroplus {     [formattribute("bordroplus.puantaj", "puantaj.b1f")]     class puantaj : userformbase     {         sapbouicom.form oform;         .....          checkbox4.valon = "y";         checkbox4.valoff = "n";         oform.datasources.userdatasources.add("ud_4", sapbouicom.bodatatype.dt_short_text, 1);         checkbox4.databind.setbound(true, "", "ud_4");         // sets checkbox checked         oform.datasources.userdatasources.item("ud_4").value = "y"; `i have created user form , tabcontrol in form. create check box in tab. 

how can start checkbox checked?

thats code. using c# in visual studio.

regarding teta's answer,you initialize valon , valoff this:

    checkbox0.valon = "y";     checkbox0.valoff = "n"; 

you need setup datasource checkbox work properly:

    oform.datasources.userdatasources.add("checkboxds", bodatatype.dt_short_text, 1);     checkbox0.databind.setbound(true, "", "checkboxds");      // sets checkbox checked     oform.datasources.userdatasources.item("checkboxds").value = "y";